High frequency coupling apparatus



lwahsee Nov. 20, 1934.

M. OSNOS HIGH FREQUENCY COUPLING APPARATUS Filed June 8, 1931 INVENTORMENDEL OSNOS Iva-11w ATTORNEY Patented Nov. 20, 1934 PATENT OFFICE I1,981,006 men monascr consume manarns Mendel Osnos, Berlin, Germany,asslgnor to Telefunken Geseilschaft fur Drahtlose Telegraphie m, b. H.,Berlin, Germany, a corporation of Germany Application June 8, 1931,Serial No. 542,731 In Germany June 20, 1930 4 Claims.

This invention relates to high frequency coupling apparatus andespecially to a transformer or coupling coil for ultra-short waves.

In working with ultra-short waves, the losses 5 occasioned in metallicconductors subject to the influence of flelds of extremely highfrequency or to the flow of currents of these frequencies are very high.This results in serious difficulties in the attempt to use transformersor coupling coils in apparatus operating with ultra-short waves.

According to this invention, these difliculties are overcome by usinggaseous-discharge tubes to act as the conductor turns of transformers orcoupler coils, said tubes being preferably made coil-shaped. The numberof turns contained in the primary and the secondary member may be chosenat will to suit the desired transformation ratios. The losses occasionedin tubes acting as conductor turns of this kind are practicallyindependent of the frequency and are relatively small.

One embodiment of the present invention is shown by way of example inthe drawing, Referring to the same p and 3 denote two gas-dischargetubes which may consist of glass, quartz, or equivalent non-conductingmaterial, and which contain a highly rarefied gaseous atmosphere such asneon, and which represent two transformer windings, say, the primary andsecondary. The relative position may be stationary or variable. Thus,they may be made slidable over one another, or, they may be made torotate relative to each other thereby varying the coupling. That is, thecoils, similar to metallic coils, may be positioned adjacent, superposedor interposed, and they may be circular or flattened in form.

A high frequency generator and modulator 2 may be connected across theprimary electrodes 4, and the output of the secondary may be fed to asuitable antenna 6. If desired, between the antenna 6 and secondary 8there may be in serted a suitable amplifler (not shown).

Moreover, the coils may be immersed in a cooling fluid, such as oil orwater and the fluid may be either stationary or flowing.

It is not necessary that a primary and secondary coil be provided, for,a single coil may be C0 used having auto-transformer connections. Thatis to say, an additonal electrode or electrodes may be inserted alongthe length of thetubuiar coil and the coil connected in the fashion ofknown auto-transformer arrangements.

Having thus described my invention, what I claim is:

1. In a system for transforming high frequency currents comprising atransformer especially adapted for short waves,' having primary I0 andsecondary low loss coilsyeach of said coils comprising a hollow quartztube fllled with an ionized gas, an input circuit coupled to electrodesof the primary coil, and an output circuit connected to electrodes ofthe secondary coil.

2.- In a system for coupling ultra high frequency currents comprising acoupling coiLsaid coil composed of a hollow quartz insulating tube, saidhollow insulating tube containing an ionized gas to form an/ionizedconducting stream for the transfer of electric energy.

3. An ultra high frequency coupling coil especially adapted for shortwaves, comprising two low loss coils composed of hollow quartzinsulating tubes, said tubes containing an ionized gas forming aconductor to transfer energy from an input source of high frequency toan output antenna circuit.

4. An ultra high frequency coupling device especially adapted for shortwaves, comprising two low loss coils in coupling relation to each other,each of said coils composed of insulating quartz tubes containing anionized gas forming a conductor to transfer energy from an input sourceof high frequency to an output antenna circuit.

DIENDEL OSNOS.

